Hi all, a bit late on this item but after a while with my 700X, here are a couple of things.........
1. Both my 700X and 550E show a tendency to 'drop' their tails when in a stable hover (the 550E has a 600-sized tail as per Steve's earlier suggestion to me). This doesn't matter too much when one's style is to zoom around but it does come into play when landing. My solution was to fit an extended set of skids so that they contact the ground before the tail fin. Although the standard landing gear leaves the tail sitting high above the ground, they don't prevent the tail coming in a bit too close to the deck when landing. Another advantage is that the 550 sits correctly with or without the battery. It really did get on my nerves before making the change as when removing the battery the heli almost always nearly fell off my bench or dropped the tail fin on the dining room table.
2. Despite painstakingly levelling the swashplate, the tendency is still there to 'drop' the tail. I'm working on adding a couple more points to the elevator servo for my 550 to lift the tail. It isn't perfect yet, but it's getting better. As I have custom servo arms on the 700X, I've already eliminated it to my satisfaction but I still have the option to do a couple of points electronically via the B.D. Axon software if I feel the need.
Bye for now.